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Measure the voltage across C96 on the second set of regulators installed. This gives the input voltage to
the second of the two 5v regulators. The voltage should measure somewhere in the 7v range. This 7v is
the no load voltage from the switching supply and drops down to 5.5v under a transmit load.
Measure the voltage across C100 on the second set of regulators installed. This is the output of the
second the 5v regulator. The voltage should measure 5v.
If the above voltage readings are correct, move on to the next section.
If some regulators read zero volts output, the most likely problem is that the pins on the regulators are
not soldered correctly (not soldered or shorted to an adjacent pin). Examine these pins closely. These
are very simple (but small) linear regulators!
Disconnect the 9v battery supply.
Norcal NC2030 v5
12-18-05
Page 36 of 128
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